CVE-2026-42298
Unauthenticated fork PR can execute code during Docker build and exfiltrate GITHUB_TOKEN.
Is CVE-2026-42298 being exploited?
Not confirmed. CVE-2026-42298 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.50% probability of exploitation in the next 30 days.
How severe is CVE-2026-42298?
CVE-2026-42298 is rated Critical with a CVSS score of 10.0. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-42298?
Yes. A fix has been recorded for CVE-2026-42298. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-42298 affect?
CVE-2026-42298 affects Postiz platform (Build & Publish PR Docker Image workflow), GitHub Actions docker build workflow. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-42298?
Apply patch; rotate credentials; audit CI workflows.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Arbitrary code execution during Docker build via fork PR; exfiltrates GITHUB_TOKEN with write-all; CI/CD compromise.
Patch when possible